Reporting owner · CIK 0001951154

West Street Life Sciences I, L.P.

Visual SEC Form 4 history across 1 companies, 35 transactions and 1 filings.

10%Attovia Therapeutics, Inc.
Open-market mix
Latest filingAug 28, 2026, 09:38 PM
Filings1Form 4 records
Buying$12.5M8 purchases
Selling$2.3M23 sales
Net value$10.3MBuys minus sells
Companies14 securities
Most recentAug 06, 2026unknown

Open-market buy performance

90-day forward return on this insider's open-market purchases

90d forward
Forward return is not available yet

We compute this from each buy's stock performance 90 days after the transaction. The price history is still being populated for some of their open-market buys, so the average and median will appear here once the daily price refresh has covered the relevant trading days.

Monthly open-market activity

Reported purchase and sale transaction counts

Buys Sells
25130-13-25823Aug 26

Net value flow

Buys minus sells

Aug 26
$10.3M

Transaction texture

Ownership and ticket size

Average P/S size$476.9K
Median P/S size$25.8K
Direct0
Indirect35
Aug 06, 2026unknown

Filing-only signals

Deterministic matches in this insider's history

Amended Filingfiling-context35Cluster Buypattern8Cluster Sellingpattern18Delayed Filingfiling-context35Derivative Transactionfiling-context8Large Buysize3Large Holdings Increaseholdings6Large Salesize5Repeat Buyerpattern7Repeat Sellerpattern18

Latest Form 4 facts

Quick context from source filings

Latest transaction

buy at Attovia Therapeutics, Inc. on Aug 06, 2026 valued at $8,500,000.

Review SEC filing
Latest buy

buy at Attovia Therapeutics, Inc. on Aug 06, 2026 valued at $8,500,000.

Review SEC filing
Latest sale

sale at Attovia Therapeutics, Inc. on Aug 05, 2026 valued at $1,607,835.

Review SEC filing

Associated companies

Visual map of known reporting history

ATTOAttovia Therapeutics, Inc.35 transactions · latest Aug 28, 2026, 09:38 PM
TickerInsiderRoleTypeSharesValueCodeSignals90d returnFiledTrans date
ATTOWest Street Life Sciences I, L.P.
10%
buy5.74k$12.1MP
Amended Filing Cluster Buy Delayed Filing+2
—08/2808/05
ATTOWest Street Life Sciences I, L.P.
10%
buy11.3k$24.2MP
Amended Filing Cluster Buy Delayed Filing+2
—08/2808/05
ATTOWest Street Life Sciences I, L.P.
10%
buy45.5k$96.9MP
Amended Filing Cluster Buy Delayed Filing+4
—08/2808/05
ATTOWest Street Life Sciences I, L.P.
10%
buy11.4k$24.3MP
Amended Filing Cluster Buy Delayed Filing+3
—08/2808/05
ATTOWest Street Life Sciences I, L.P.
10%
buy28.7k$60.9MP
Amended Filing Cluster Buy Delayed Filing+3
—08/2808/05
ATTOWest Street Life Sciences I, L.P.
10%
buy2.87k$6.09MP
Amended Filing Cluster Buy Delayed Filing+3
—08/2808/05
ATTOWest Street Life Sciences I, L.P.
10%
unknown4.44M$0C
Amended Filing Delayed Filing Derivative Transaction
—08/2808/06
ATTOWest Street Life Sciences I, L.P.
10%
unknown18.1M$0C
Amended Filing Delayed Filing Derivative Transaction
—08/2808/06
ATTOWest Street Life Sciences I, L.P.
10%
buy500k$850MP
Amended Filing Cluster Buy Delayed Filing+2
—08/2808/06
ATTOWest Street Life Sciences I, L.P.
10%
unknown478k$0C
Amended Filing Delayed Filing
—08/2808/06

West Street Life Sciences I, L.P. Insider Activity FAQ

SEC Form 4 context

Who is West Street Life Sciences I, L.P.?

West Street Life Sciences I, L.P. is a reporting owner in SEC Form 4 filings with reporting owner CIK 0001951154.

Which companies has West Street Life Sciences I, L.P. reported transactions for?

Attovia Therapeutics, Inc.

When was West Street Life Sciences I, L.P.'s latest insider buy?

buy at Attovia Therapeutics, Inc. on Aug 06, 2026 valued at $8,500,000.

When was West Street Life Sciences I, L.P.'s latest insider sale?

sale at Attovia Therapeutics, Inc. on Aug 05, 2026 valued at $1,607,835.

Where can I see the original SEC filings?

Each transaction row links directly to the source SEC filing so the reported Form 4 details can be reviewed.

Are performance metrics included?

This version does not calculate win rates, forward returns, benchmark-adjusted returns, or high-conviction scores.